Open Source License Risk When You Redistribute Software

A great deal of open source obligation is conditional. The condition that matters most for many licenses is distribution, meaning the act of conveying a copy of the software to someone outside your organization. Use a component only inside your own walls and many of its terms never fire. Put the same component inside a product you ship, an appliance you sell, or a container image you publish, and the conditions activate. This is why two companies running the identical dependency can carry entirely different exposure. One uses it internally. The other redistributes it. The license treats them differently, and so should any honest assessment.

What redistribution means and why it matters

Redistribution, for license purposes, generally means conveying a copy of the software to a third party. Shipping an installed desktop application counts. Selling a hardware appliance with software baked in counts. Publishing a container image that bundles dependencies counts. Handing a build to a customer to run on their own infrastructure counts. The common thread is that a copy leaves your control and lands with someone else. Running the same software purely for your own internal operations usually does not meet that threshold, which is why internal use carries a lighter obligation set than shipping a product.

The line is not always obvious. A subsidiary, a contractor, or a joint venture can sit on either side of the organizational boundary depending on the arrangement. Bundling a dependency inside a larger work can change how its terms apply to the whole. These are exactly the questions where a buyer should map the facts carefully and take the interpretation to counsel, because the answer turns on specifics rather than on a general rule.

Copyleft obligations that activate on distribution

Copyleft licenses are the clearest case. The GNU GPL ties its central obligation to distribution: when you ship a copy of GPL covered software, you generally must offer the corresponding source code and pass the same license terms downstream. Used internally, that source obligation lies dormant. Shipped in a product, it activates. For a redistributor, a single GPL component buried in a build can therefore create an obligation to make source available that the company never planned for. The risk is not that the license is unusable. It is that the obligation was invisible until a copy went out the door.

The GNU AGPL goes further. It extends the source trigger from shipping a binary to making the software available over a network, which means offering a hosted service can create the same obligation as distributing a copy. For a company that thought hosting kept it clear of distribution terms, the AGPL closes that gap. The mechanics of how these obligations reach into a product are part of the hidden open source exposure in production.

Source available terms and the redistributor

The recent relicensing wave adds a second layer for anyone who ships software. As of August 2023, HashiCorp moved Terraform, Vault, Consul, Nomad, and Packer to the Business Source License 1.1, which restricts competitive production use and can limit how a product built on those components is offered. Redis moved to a dual model with the Server Side Public License as of March 2024, and Elasticsearch and Kibana moved to the Server Side Public License and the Elastic License as of 2021. MongoDB moved to the Server Side Public License in 2018. Source available is not open source, and neither the Business Source License nor the Server Side Public License is approved by the Open Source Initiative. For a redistributor, a relicensed dependency inside a shipped product can change what the company is permitted to do with it, which is why a shipped product carries higher stakes than internal use when one of these components is present.

How to find redistribution exposure before you ship

The method is the same discipline that governs all license risk, applied with the distribution trigger in mind. Resolve the full dependency tree of everything that goes into a shipped artifact, direct and transitive, and identify the components whose terms activate on distribution: copyleft licenses, the AGPL, and any source available component. Then decide for each whether the obligation can be met, the component replaced, or a license negotiated. Doing this before release is far cheaper than doing it after a customer holds a copy, because once shipped, a copy cannot be recalled and the obligation is already live. The way to build that tree is covered in transitive dependencies and hidden license risk.

This work sits on the open source license risk pillar, and an open source license risk assessment maps the redistribution exposure in a product before it ships. We are independent and buyer side. We take no vendor fees and resell no software, so our findings reflect your exposure and nothing else. This is commercial and licensing risk advisory, not legal advice. For interpretation of distribution terms and your compliance position, engage your own counsel.